diff --git a/README.md b/README.md
index 4608da7..ac420d8 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,8 @@ function onChange(filters) {
 ]
 ```
 
+Output items carry state flags: `disabled: true` / `hidden: true` are skipped by middleware by default, `readOnly: true` is parsed normally, and `empty: true` marks an empty value (kept unless `skipEmpty`).
+
 Pair with `@windychen/trans-form-middleware` for server-side parsing.
 
 See `DESIGN.md` for full grill-me decisions (Q1–Q61).